In figure 4, an object of mass 10 000 g is released at point A, slides to the bottom of the 30° incline, then collides with a horizontal massless spring, compressing it a maximum distance of 75 cm. The spring constant is 560 N/m, the height of the incline is 2.0 m, and the horizontal surface is frictionless while the incline has some fiction. What is the speed of the object at the bottom of the incline?